Defending Against Firmware Cyber Attacks on Safety-Critical Systems

In the past, it was not possible to update the underlying software in many industrial control devices. Engineering teams had to ‘rip and replace’ obsolete components. However, the ability to make firmware updates has provided significant benefits to the companies who use Programmable Logic Controllers (PLCs), switches, gateways and bridges as well as an array of smart sensor/actuators. These updates include security patches when vulnerabilities are identified in existing devices; they can be distributed by physical media but are increasingly downloaded over Internet connections. These mechanisms pose a growing threat to the cyber security of safety-critical applications, which are illustrated by recent attacks on safety-related infrastructures across the Ukraine. Subsequent sections explain how malware can be distributed within firmware updates. Even when attackers cannot reverse engineer the code necessary to disguise their attack, they can undermine a device by forcing it into a constant upload cycle where the firmware installation never terminates. In this paper, we present means of mitigating the risks of firmware attack on safety-critical systems as part of wider initiatives to secure national critical infrastructures. Technical solutions, including firmware hashing, must be augmented by organizational measures to secure the supply chain within individual plants, across companies and throughout safety-related industries

Estimating the Social Welfare Effects of New Zealand Apple Imports

This paper provides a demonstration of how a comprehensive economic framework, which takes into account both the gains from trade and the costs of invasive species outbreaks, can inform decision-makers when making quarantine decisions. Using the theoretical framework developed in Cook and Fraser (2008) an empirical estimation is made of the economic welfare consequences for Australia of allowing quarantine-restricted trade in New Zealand apples to take place. The results suggest the returns to Australian society from importing New Zealand apples are likely to be negative. The price differential between the landed product with SPS measures in place and the autarkic price is insufficient to outweigh the increase in expected damage resulting from increased fire blight risk. As a consequence, this empirical analysis suggests the net benefits created by opening up this trade are marginal.International Relations/Trade,

Coupled modes of North Atlantic Ocean-atmosphere variability and the onset of the Little Ice Age

This research was funded by grants from the US National Science Foundation P2C2 program (AGS-1501856, and AGS-1502224). BIC was supported by the NASA Modeling, Analysis, and Prediction program (NASA #80NSSC17K0265).Hydroclimate extremes in North America, Europe, and the Mediterranean are linked to ocean and atmospheric circulation anomalies in the Atlantic, but the limited length of the instrumental record prevents complete identification and characterization of these patterns of covariability especially at decadal to centennial timescales. Here we analyze the coupled patterns of drought variability on either side of the North Atlantic Ocean basin using independent climate field reconstructions spanning the last millennium in order to detect and attribute epochs of coherent basin-wide moisture anomalies to ocean and atmosphere processes. A leading mode of broad-scale moisture variability is characterized by distinct patterns of North Atlantic atmosphere circulation and sea surface temperatures. We infer a negative phase of the North Atlantic Oscillation and colder Atlantic sea surface temperatures in the middle of the 15th century, coincident with weaker solar irradiance and prior to strong volcanic forcing associated with the early Little Ice Age.Publisher PDFPeer reviewe

Psychiatrists’ attitudes to professional boundaries concerning spirituality and religion: mixed-methods study

Aims and methodCalls for the integration of spirituality into psychiatric practice have raised concerns about boundary violations. We sought to develop a method to capture psychiatrists’ attitudes to professional boundaries and spirituality, explore consensus and understand what factors are considered. Case vignettes were developed, tested and refined. Three vignettes were presented to 80 mental health professionals (53% said they were psychiatrists; 39% did not identify their professional status). Participants recorded their reactions to the vignettes. Four researchers categorised these as identifying boundary violations or not and analysed the factors considered.ResultsIn 90% of cases, at least three of the four researchers agreed on classification (boundary violation; possible boundary violation; no boundary violation). Participants’ opinion about boundary violations was heterogeneous. There was consensus that psychiatrists should not proselytise in clinical settings. Reasoning emphasised pragmatic concerns. Few participants mentioned their religious beliefs. Equivocation was common.Clinical implicationsMental health professionals seem unsure about professional boundaries concerning religion and spirituality in psychiatric practice

The reconstructed Indonesian warm pool sea surface temperatures from tree rings and corals: Linkages to Asian monsoon drought and El Niño–Southern Oscillation

[ 1] The west Pacific warm pool is the heat engine for the globe's climate system. Its vast moisture and heat exchange profoundly impact conditions in the tropics and higher latitudes. Here, September - November sea surface temperature (SST) variability is reconstructed for the warm pool region (15 degrees S - 5 degrees N, 110 - 160 degrees E) surrounding Indonesia using annually resolved teak ring width and coral delta O-18 records. The reconstruction dates from A. D. 1782 - 1992 and accounts for 52% of the SST variance over the most replicated period. Significant correlations are found with El Nino - Southern Oscillation (ENSO) and monsoon indices at interannual to decadal frequency bands. Negative reconstructed SST anomalies coincide with major volcanic eruptions, while other noteworthy extremes are at times synchronous with Indian and Indonesian monsoon drought, particularly during major warm ENSO episodes. While the reconstruction adds to the sparse network of proxy reconstructions available for the tropical Indo-Pacific, additional proxies are needed to clarify how warm pool dynamics have interacted with global climate in past centuries to millennia.</p

Towards a computational reading of emergence in experimental game design

In any prolonged creative act, there may be moments when an interesting and/or surprising aspect of the artefact being created, or a related idea, emerges without prior knowledge of the creator. Such emergent properties can be capitalised on to drive the creative process. With the Gamika iOS app, we have made it possible to create novel casual game levels in minutes and hours rather than the usual days and weeks. This has enabled us to undertake and analyse game design sessions with a think aloud methodology, focusing on moments of emergence and how they influenced the level design. This has in turn led us to an initial computational reading of emergence in game design, where we imagine how an automated game designer could recognise and take advantage of unexpected changes in aspects such as aesthetics, gameplay and playing strategies which arise during the creative process

Automated tweaking of levels for casual creation of mobile games

Casual creator software lowers the technical barriers to creative expression. Although casual creation of visual art, music, text and game levels is well established, few casual creators allow users to create entire games: despite many tools that aim to make the process easier, development of a game from start to finish still requires no small amount of technical ability. We are developing an iOS app called Gamika which seeks to change this, mainly through the use of AI and computational creativity techniques to remove some of the technical and creative burden from the user. In this paper we describe an initial step towards this: a Gamika component that takes a level designed by the user, and tweaks its parameters to improve its playability. The AI techniques used are straightforward: rule-based automated playtesting, random search, and decision trees learning. While there is room for improvement, as a proof of concept for this kind of mixed-initiative creation, the system already shows great promise

‘It’s just not worth a damn!: investigating perceptions of the value in attending university

Mass expansion of the UK Higher Education (HE) sector is eroding its well-documented benefits – leading many to question whether HE remains worthwhile. Avoiding the traditional approach of estimating the returns to HE, we investigate why many now feel that attending university will not yield any financial benefits. Using BSA data from 2010 we find that this negativity is being driven by perceived lack of graduate job prospects, the rise in tuition fees and wage underpayment. We conclude that this may well fuel uncertainty and reduce demand for HE from lower socio-economic groups while increasing intra class conflict in higher socio-economic groups